Cereal crop-specialized systems can provide significant biomass that can be directly exploited by grazing. Through an experimental system set up with farmers in the Paris Basin, this study investigates the agronomic impacts of grazing winter cover crops and winter cereals by sheep. In this study, the grazing of cover crops did not penalize the following spring crop. Compared to a mechanical cover crop termination, the abundance of slugs is reduced by 60 % after grazing, the availability of mineral nitrogen in the soil increases on average by 6 kg N/ha when sowing the spring crop. Soil structure and carbon storage are marginally degraded. Cereals grazed at the start of tillering show a yield gain of 4.8 q/ha. Grazing cereals at stem elongation decreased grain yield by 7,5 q/ha. Sheep grazing in cereal crop specialized systems shows potential to produce animal proteins during autumn and winter, while maintaining cropping system production. We predict a strong interest in these systems in the context of the agroecological transition, whether it be at the plot, farm and territory scales.